Rice Is the Primary Nutrient Source for About One-Third of Humanity-Approximately

question 32

Multiple Choice

Rice is the primary nutrient source for about one-third of humanity-approximately 2 billion people worldwide. One major disease of this crop, called rice blight, is caused by a bacterium Xanthomonas oryzae . This disease causes the rice plant to turn yellow and wilt and can affect up to 50 percent of the crop. Wild forms of rice have a natural resistance to the Xanthomonas bacterium, but these wild forms are not usable as crop plants. Scientists have developed a blight-resistant strain, using genetic engineering. Strains of blight-resistant rice have been grown successfully in several countries. Assume some types of wild rice produce seeds of two different colors-brown and white. If you cross two plants and end up with three seed colors-brown, tan, and white, you would correctly assume that this trait __________.

• A) exhibits incomplete dominance
• B) is polygenic
• C) is pleiotropic
• D) exhibits codominance

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Definitions:

Romantic Love

Type of love consisting of intimacy and passion.

Intimacy And Passion

Components of love in Sternberg's Triangular Theory of Love, where intimacy involves feelings of closeness, and passion involves physical attraction and sexual arousal.

Norms

Established standards of behavior and beliefs in a group or society.

Behavior

The actions or reactions of an object or organism, usually in relation to the environment or stimuli.